Slide projector



Feb. l6`, 1926. 1,573,030

v E, w. BERGERE l SLIDE PHOJETOR Filed June 28,- 1924 G Sheets-Sheet 2 INVENTOR ATTORNFV f' Feb. 16 ,1926. 1,573,030

E. w. BERG'ERE SLIDE 'PROJECTOR Filed June 28, 1924 6 Sheets-Sheet 3 ATTORNEY Feb. 16 1926. 1,573,030

E. w. BERGERE SLIDE PRoJcTon Filed June 28, 1924 6 Sheets-Sheet 4 A Fg-lq. y 3

' INVENTOR Wie/cx wfeafef.

ATTORNEY Feb. 16,1926. 1,573,030

- E. w. BERG-ERE I i SLIDE PROJECTOR A med June 28, 1924 e sheets-sheet s m lllllllrlllll; `vlllllllllllllrllllq mvENToR Ewig/cv( w. 3586555 BY w. WM

ATTORNEY Feb. 16 1926.

E. w. BERGER:

SLIDE PROJECTOR 6 Sheets-Sheet 6 Filed June 28, 1924 I I I l ATTORN EY.

Patented Feb. 16, 1926.

UNITED srAiEs PATENT OFFICE.

EMERICK W. B'ERGERE, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TC FRANK HOWARD, GF NE'W YORK, N. Y. l

SLIDE PROJECTOR.

Application. filed June 28, 1924s. Serial No. 722,958.

To all caon-i t may conce-rn:

Be it known that Eivrnnion l/V. BEnGnnn, a citizen of the United States, and res-ident of Bric geport, in the county of Fairfield and State ot Connecticut, has invented certain new and useful Improvements in Slide Projectors, of which the following is a specification.

This invention relates to a machine, known as aV lantogram or slide projector, for projecting sign-s or pictures on a screen.

An object of the invention is to provide an automatic machine of the present char acter which will possess various simple and novel features and characteristics of construction adapted to rende-r the machine reliable and durable in use to perform its intended i'unction in eiiicient and improved manner.

it further object is to provide a lantegrain having a plurality of slide holders, each adapted to carry a lantern slide ordinai-ily bearing an advertisement, and havfing a. plurality, two or more, ot stations each with screen upon which the advertisements of the lantern slides are to be project-ed, and to provide in the. machine mechanism for automatically feeding the slides to and from. each station, whereby the advertisement of each slide is successively fed 'from station to station in the machine.

A further object is to provide a lantegram or slide projector' as stated, wherein there can be any preferred and variable number oi lantern slides upon the machine, the feeding of the slides successively from station to station being independent of the number oi? slides and slide holders located between the respective stations.

A further object is to provide a novel and improved continuous track or runway for the. slide holders, and to associate with said tracli or runway and said slide holders unique devices adapted to 4the purposes of successively feeding thefslide holders .and allowing the saine to be fed to and from the stations in the machine. l j

A further object is to provide in the machine an improved arrangement for the projection of light from a lam-p with relecto-r to a mirror utilized in connection with each advertisement projecting station, the arrangement including a casing housing the'lamp and reflector, a condenser through which the. light 1s' made to pass, and a focusing lens: adjustable toward and away from the condenser and lamp, wherein the light from the lamp and` its reflector and passing through the advertisements of the different slides can be properly focused upon the mirrors for projection to the screens.

A. further object is to provide a simple arrangement for associating each mirror with a focusing lens whereby the. angle of the mirror can be adjusted with respect to screen.

And yet another object is to provide slide holders of' simple structure capable of readily and easily removably receiving the lantern slides, and of themselves being incorporated in or removed from a continuous chain of slide holders extending past all of the stations in the machine.

lVith the. above objects in View, as well as oth-ers which will appear as thespeciication proceeds, the invention comprises the constructionI arrangement and. combination of parts as no-w to be fully described and as hereinafter to be specifically claimed, it be ing understood that the disclosure herein is merely illustrative and meant in no way in a limiting sense, changes in vdetails of construction and arrangement of. parts being permissible so long as within the spirit. of the invention and the scope of the appended claims.

In the accompanying drawing formingv a part ol this specification,

Figi. l is a bottom plan view of a machin-e in which the features of the invention are incorporated, the casing for the lam-p, reflector and' condenser being shown in section as on line 1 1 in Fig. 3, lookin-g in the direction. of the arrows;`

2 isa sectional view on line 2 2 in Fig. l, looking in the direction: of the arrows chine;

Fig. 1 /l is a sectional view, as on line 4 4 in Fig. 3f, looking in the direction of the arrows, showing a fragment ot the machine;

Fig. 5 is an enlarged elevational view detailing, more clearly portions of the machine as disclosed in Flo'. 55;.

3 is an elevational view of the ma- Fig. 6 is a sectional view as on line 6 6 in Fig. 5, looking in the direction of the arrows;

Fig. 7 is a sectional view on an enlarged scale on line 7 7 in Fig. 3, looking in the direction Vof the arrows;

Fig. 8 is a sectional view as on line 8 8k in Fig. 7, looking in the direction of the arrows;

Figs. 9 and 10 are detail views disclosing the nianner in which the slide holders with slides are fed to and away from the advert-iseinent projecting stations;

Fig. 11 is a plan View of Fig. 12;

F-ig. 12 is a detail in elevation disclosing slide holders as when being fed to a station, corresponding with the showing of Fig. 8;

`F ig. -13 is a plan View of connected slide holders with lantern slides; and

Fig. 14 is a` sectional view on line 14--14 in Fig. 13, looking in the direction of the arrows, disclosing a lantern slide as when being inserted ni or renioved frein a holder,

a lantern slide in its nornial position in a holder, and a slide holder with lantern slide renioved. V

In the present application I have preferred to illustrate an einbodinient of the Alaiitograni or slide projector including four duplicate stations each with inirror adapted to project an advertisement or sign, there being, naturally, four screens (not shown), one

facing each niirror at preferred distance 'froni the inirror,'upon which the advertiseinents or'signs are to be projected. Clearly, v4as will be understood froin the description following, vthe machine could include a 'greater or less nuinber of stations.

IOf'the lantograni, 1() is a franie plate, ap-

fproXiinatelyv lcircular as disclosed, having cut-away portionsll`v at the four stations 12 sin the inachine.

Theffraine plate may be supported in any inanner. As illustrated, it

-is suspended from a beain 13 by iiieans of bolts 14 attached to the heani at 15 and to 1the fraine plate at 16.y

The inechanisni of each station 12 constitutes a unit of the machine, all of the units being duplicates and being supported by the fraine plate.

'in -any suitable nianner to av slide block 22 carried by a thunib piece 23 vertically adjustable in al slot 24 in the upright 18, the slide block having pivoted to it at 25 an crdinarily obliquely positioned inirror 26 the upper end of which is pivoted to a rod 27 with threaded end portion 28 passing through a vert-ical elongated slot 29 `in a bracket 30 secured to the upper face of the fraine plate, there being an adjusting nut 29 upon the threaded end portion 28 whereby the angle of inclination of the inirror can be adjusted. The elongated slot in the bracket 30 allows the iod vertical swinging inoveinent to compensate for vertical adjustinents of the slide block with focusing lens and carrying the niirror, as will be understood.

The lower end portion of the upright 17 has a vertical elongated slot 31 in which a thunib piece 32 is adjustable, said thunib piece 32 carrying a collar 33 which envelops and supports the neck portion 34 of a casing 35 enclosing a lanip 36 with reflector 37. Numeral 38 represents a condenser supported in any suitable nianner in the neck portion 34, directly beneath the focusing lens, and designed to directall light through it to the focusing lens.

The casing 35 has a-plate 39 with opening 40 above the lainp and beneath the condenser, and a plate 41 beneath the reflector, and the base of the casing has a Ventilating opening 42. The plates 39 and 41 are spaced froin the side walls of the casing to assist ventilation through the opening 42, while said plates, together with the casing, direct light froni the lanip through the condenser and to the focusing lens. The casing and condenser are supported from the upright 17 kby the thunib piece 32, and by adjusting the thunih piece in the elongated slot 31 the lanip 'and condenser are adjusted toward or away from the focusing lens.

The lantern slides are adapted to be passed between the upriglits 17, 18 and the .focusing lens andV condenser of each unit,

and each lantern slide is adapted to reniain stationary at a station to be projected to its Aniiri'or and thence toits screen for a desired and predetermined interval of tinie. To4 the accoinplishnient of this end, a continuous chain of slide holders and a continuous track or runway for the chain is provided, the sections of the track or runway being duplicates. rl`hat is, in the inachine illustrated, there aie four duplicate sections of track or runway. c

f each section of the track or runway, 43 are spaced apart and opposed guides carried by the inner faces of the upriglits 17, 18k and having rearwardly and downwardly disposed guards'44 (see Fig. 8) for a purpose to be iiiade clear, 45 are spaced apa-rt and opposed guides secured to the forward portions of the uprights 17, 18 as at 4G and f extending ohliquelyv 'downwardly therefrom,

and 47 are brace nienibers secured to one of the tie rods 2O at the rearward portions of the s will be more clear from Figs 18 and 14, each slide hold-er 49 is of peculiar construction to removably receive a lantern slide 50. That is, each slide holder consists of a plate 51 having a. large opening 52 whereby the lantern slide can be visible and a margin 58 against which the margin ofthe lantern slide rests, and the opposite ends of the plate are uptnrned, one end having inwardly extending flange 54 aarallel with the body ofthe plate and the. other end having a somewhat similar flange 55 curled in toward the plate body as at 56 and adapted to hold in the pocket 57, between the plate body and flange 55 and opposite the pocket 58 between the plate body and flange 54, aleaf .spring 59. The side edges 80 of each -plate 51 are parallel with e-ach other an-d perpendicular to the plate body, and each side edge has extensions 61 providing an ear at each corner ofthe slide holder. To insert a lantern slide in a slide holder, one end of the slide is pressed into the pocket 57 against the action of the spring 59 (see Fig. 14), and the opposite end is made to enter the pocket 58 (see the dotted line Fig. 14, at left), the lantern slide approximately lling the space between the side edges (30: lVhen then the spring 59 is allowed to act, the slide is held clamped by the spring, lbeneath the flange 55 and in the pocket 58. The lantern slide is thus easily removable, but will not become accidentally displaced.

f The slidel holders are hingedly connected to each other in the manner best shown in Fig. 18, 62 denoting links between aligning ears 61 of the slide holders, desirably at the inner sides of the ears, and G3, '64 representingrivets passing through openings in the ears and links, each bushing 65 upon a rivet and between opposed links insuring the position of the links and ears.

As will be clear from Figs. 11, 12 and 13, the rivets 68 and 64 connect alternate slide holders in a continuous chain of slide holders, the .rivets 64 having extended heads with enlargements 66, said heads being adapted to ride on opposed guides 45 with their enlargements beyond the guides (see Figs. 11 and 12), while the rivets 63 are adapted to pass freely between said guides 45. As will be apparent from Figs. 6 and 7, the guides 48 `are spaced apart just sufficient Vto receive the shorter heads 67 of the rivets G3, and the enlargements 56 extend just beyond shoulders 43 of said guides 48. lVhen then the slide holders with lantern slides are placed upon the continuo-us track or runway constructed as fully set forth, so

that a lantern slide is upon the guides 48V and between the condenser and focusing lens, in position to be projected upon a screen, the slide holders will arrange themselves about as shown in Fig. 8, the down- "tween uprights 17,18, spacedV arms 7 wardly slanting guides 45 insuring that the slide holders will move from station to stameshing with a worm wheel 72 mounted upon the frame plate and having` a master cam 78.

Each unit or station in the machine has a roclshaft 74 mounted in the uprights 17, 18 and a bracket 7 5 upon the frame Yplate (see Fig. 5), and carrying an arm 76 adapted to be actuated by the master cam to rotate the roelrshaft. Upon each roclrshaft and be- 7 are fixed (see Figs. 5 and 8), each arm 77 having an elongated opening 78'in its lower poition, said openings 78 receiving a rod 79 eX- tending between the arms. 80 are screws secured to the rod 79 and passing through the arms 7 7 the screws being longitudinally adjustable in the roclrshaft 74 to fix the rod 79 at desired and variable distance from said roclshaft, and 81 are links pivoted upon the rod 79 at 82 and upon levers 88 at 84 as shown at the midlengths of said levers, the upper end of each lever being pivoted between uprights 17 and 18 as at 85 and the lower end of each lever pivotally carrying as at 86 an operating member 87 for feeding the slide holders. 88 are guides opposite the guides 48 and beneath which the heads of the rivets 83, 64 pass. Fach guide 88'has a longitudinal slot 89 in its inner side edge in which a pin 90 securing a pawl 91 to an operating member 87 rides, each of said members 857 including a shoulder 92 adapted to limit the pivotal movement of the pawl upon its axis.

rlhe manner in which the feeding is done will now be obvious. fis the master cam is caused to rotate,'each arm 76 will be successively actuated to actuate the operating members 87 at the different stations (from right to left in Fig. 8). As shown in said 8, the pawls 91 have engaged back of a slide holder between and adjacent its side bars or ears. As the operating lini-anbei' moves forwardly, the slide holder engaged is moved away from position between the condenser and focusing lens, and the succeeding holder is moved to focusing position. Numeral 93 represents coil springs, one for each arm 76, one end of each spring being secured to an arm 7 6 as at 94and the other end being secured to the frame plate as at 95. The stroke of the operating mem-bers 87 is determined by the adjusted position of the rod 7 9 in the elongated opening 78 as will be evident, and as soon as the master cam releases an arm '76, the spring 94 returns this arm to its normal position, causing the operating members S7 to move back to their position of Fig. 8. As said operating members move backward, the pawls turn upon their pivots to be removed from the slide holder, see Fig. 9, with operating members at end of feeding stroke, and Fig. 10 with pawls releasing themselves from slide holder, about to slide backwardly over margin of slide holder or lantern slide adjacent the opening of slide holder. When the pawls reach their furthest position to the rear, they enter a space back'of a slide holder, their own weight or a spring (not shown) accomplishing this, as they are shown in Fig. 8, ready to feed the next slide in the manner already stated.

Clearly, in the present machine the master cam feeds a slide at one station and then moves successively from station to station, each slide remaining in focusing position while the master cam makes almost a complete revolution. rlhe length of time for the cam to make a revolution can, evidently, be varied at will by employing mechanism causing the cam to be rotated faster or slower.

Slide holders of the continuous chain can be removed or inserted by simply making a rivet 63 or 64 removable, and the guides 45 can contain a variable number of slide holders, the feeding of the slide holders along said guide 45 depending upon the downward slant of said guides as well as 'upon -the operating members 87. As the slide holders pass along the guides 45, the rivets 64 ride on the guides at more or less distance apart, while the rivets 63, as well as all of the slide holders, are situated below said guides. The joints between the slide holders are suiiiciently loose so that the continuous chain can nicely follow the track or runway. As disclosed more clearlyY in Fig. S, three slide holders are always (when not being fed) upon the guides 43 and guards 44 of a station or unit. Nhen the operating members 87 are actuated to feed a slide holder A away from a focusing station and the succeeding holder B to said station, a third holder C rides up onto the guides 43 and guards 44 which are betweenthe slide holders and the casing of the lamp, while a fourth holder I) moves to position adjacent guides 43 and guards 44. Numeral 96 denotes opposite, upwardly extending abutments at the forward ends of the guides v45. /Vhen the slide holders are as disclosed in Fig. 8 and the operating members 87 feed forwardly, a longer rivet F adjacent the rear end of the fifth slide holder E rides up over the abutments, while the said fifth slide holder E as.

sumes a practically horizontal position, the

abutments now lying between the longer rivet F and theneXt succeeding longer rivet G. Then during the neXt succeeding feeding movement of the operating members 87, the longer rivet G rides over the abutmeuts 96, as shown in Fig. l2, while the slide hold-` er E of said Fig. l2 is assuming the position of the holder C of Fig. 8. Now the shorter rivets 68 connecting slide holders directly back of slide holder E (Fig. 12) moved to C as described, assume the positions of slide holders D and Ein Fig. 8. Upon further feeding the operations described are repeated. In leaving the guides 43 and passing onto the guides 45, as at H in Fig. 8, the rivets 64 ride upon the guides, While the rivets 63 fall first to the position shown at I and then to the position J, the slant of the guides 45, as well as the feeding movement of the operating members 87, feeding the slide holders along. j

Numeral 97denotes a spring, one at each focusing station, adapted to urge the slide holdersk at the stations upwardly in order that the action of the pawls in feeding the holders will be positive. f

The arrangement as disclosed in Fig.A 7 and as fully described provides for adjusting the lamp andv condenser with respect to the uprights, and for adjusting the focusing lens toward and away from the condenser so that the advertisements of the different slides can be properly focused upon the mirror for projection to the screen. rIvhe screens naturally, will be located suitably to perform their service. The arrangementv .as fully setforth also cares for a direct line of travel of light from the lamp and reflector to the mirror without obliterating any partof an advertisement on lantern slides.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

l. In a machine of the character described, a plurality of slide holders each adapted to carry a lantern slide, a plurality of slide projecting stations at each of which all of the slides are adapted to be successively projected upon a screen, mechanism for feeding the slides to and from each station, and means wherebyslides adjacent a station can be fed independently of all other slides in the machine.A .v

2. In a machine of the character described, a plurality of slide holders'each adapted to carry a lantern slide, a plurality of slide projecting stations at each of which all of the slides are adapted to be successively projected upon a screen, mechanism for feeding the slides to and from eac-h station, and means for feedinga slide at a station while slides at other stations are at rest.

3. In a machine of the character 'de-scribed, a plurality of slide holders each adapted to carry a lantern slide, a plurality of slide projecting stations at each of which all of the slides are adapted to be successively projected upon a screen, mechanism forl feeding the slides to and from each station, and means whereby the feeding of :slides to and from a station is independent of the feeding of slides at other stations.

4;. Ina machine of the character described, a pluralityv of slide holders each with lantern slide, :a plurality of stations each with slide projecting' means, mechanism for successively feeding each slide holder past each station whereby an advertisement upon each lantern slide can be successively projected upon a screen adapted to be situated adjacent each station, and means whereby the feeding` of slides to and from a station is independent of the feeding` of slides at other stations.

5.. In a machine of the character described, a plurality of slide holders each with lantern slide, a plurality of stations each with slide proj eeting means. mechanism for succes-sirely feeding each slide holder past each station whereby an advertisement upon each lantern slide can be successively projected upon a screen adapt-ed to be situated adjacent each station, and means for feeding a slide at a station while slides at other stations are at rest. Y

6. In a. ina-chine of the character described,

.a plurality of slide holders each with lantern slide, a plurality of stations each with slide projecting` means, mechanism for .successively feedingl each lantern slide to and away from focusing position atthe different stations, and means jivhereby the feeding of slides to .and away from focusing' position at a station can be accomplished while slides at other stations remain in focusing position.

7. In a machine of the -character described, a continuous chain of slide holders each with lantern slide, a plurality of stations each with means for focusing and projecting advertisements of the different slides of said continuous chain, mechanism for successively feeding each slide to and away from focusing and proj ecting position at each station, the mechanism being adapted to allow each slide to remain at focusing and projecting position at a station for a predetermined interval of time, and means whereby the feeding of slides to and from ay station Vis independent of the feeding of slides at other stations.

8. In a machine of the character described, a continuous chain of slide holders each with lantern slide, a plurality of stations each with means for focusing and projecting advertisements of the different slides of said continuous chain, mechanism for successively feeding each slide to and away from focusing and projecting position at each station, the mechanism being adapted to allow each slide to remain at focusing and projecting positicn'at a station for a. predetermined interval of time, and means for feed-- ing a .slide at a station while slides at other stations are .at rest.

9. In a machine ofthe character described, a continuous `chain of slide holders each with lantern slide, a plurality of stations each with means for focusing and projecting advertisements of the different slides of said continuous chain, mechanism for successively feeding each slide to and away from focusing and projecting position at each station, the mechanism being adapted to allow each slide to remain at focusing and projectingI position at a'station for a predetermined interval of time, and means whereby slides adjacent a stationrcan be fedindependently of all other slides in the machine. 1

10. In a machine of the character described, a continuous chain of slide holders each with lantern slide, a plurality of stations each with means for focusing an-d projecting advertisements of the different yslidesof :said continuous chain, mechanism for successively feeding each slide to and away from focusing and projecting position Lat, each station, the mechanism being adapted to allow each slide to remain at focusing and projecting position at a lstation for a predetermined interval of time, means whereby the successive feeding of the chain of slidesV can be uninterrupted, and means for feeding a slide at a station while 'slides at other stations are at rest. y j

11. In a machine of the character described, a continuous chain of-slide holders each with lantern slide, a plurality lof sta-- tions each with means for focusing and prO.-

jecting advertisements of the different slides of `said continuous chain, mechanism for successively feeding each slide to and away from focusing and projecting position at each station, the mechanism being adapted to allow .each slide to remain at focusing and projecting position at a station fora predetermined interval of time, means whereby the successive feeding of the slides past each station can be uninterrupted, and means for feeding slides adjacent a. station while slides of the chain are at rest.

l2. In a machine of the character deeach with lantern slide, a plurality of stations each with means for focusing and projecting advertisements of the different slides of said continuous chain, mechanism for successively feeding each slide to and away from focusing and projecting position at each station, the mechanism being adapted to allow each slide to remain at focusing and projecting position at a station for a predetermined interval of time, means whereby the successive feeding of the .slides from station to station can be per-' formed uninterruptedly, and means for scribed, a continuous chain of slide holders j feeding slides at a station while slides in the chain are at rest, whereby the feeding jacent stations in the machine. y

13. In a machine of the character de-' scribed, -a continuous chain of slide holders each with lantern slide, a continuous runway for said slide holders, a plurality of stations each with means for projecting advertisements of the different lantern slides upon a screen, means whereby the feeding of the chain of slide holders canbe unin terrup-ted to successively carry each ,slide holder from station to station, -mechanism whereby each lantern slide can be in operative positionv at a station for a predetermined interval of time, and means for feeding individual slide holders of the chain while other slide holders thereof are stationary.

14. In a machine of the character described, in combination, a continuous cha-in of slide holders, a plurality of advertise ment projecting stationspast which said holders are adapted to be fed, and a continuous runway for said chain of slide holders, the runway 'consisting of duplicate sections one for each station and comprising spaced guides, thevguides at the sta tions being closer together than the guides between stations, and-'the slide holders being hingedly connected by means of relatively long rivets adapted to ride upon all of said guides and by shorter rivets adapted to ride only upon the guides at the stations and to pass freely between the other guides', mechanism for feeding lthe chain of slide holders along the continuous runway, and means whereby slide holders 'can be stationary in the machine while other slide holders are being fed. n

15. The combination as specified in claim 14, wherein there are guides of each duplicate section leading from a station on a downward slant toward an adjacent station, whereby7 the relatively long rivets will freely slide down said last mentioned guides while the slide holders andall ofthe shorter rivets will fall beneath said guides to allow the long rivets to move relatively close together and toward said adjacent station, and wherein there are guides of each duplicate section leading to a station on an upward slant, the feeding of a slide holder at said station last mentioned causing the chain of slide holders directly following said feed slide holder to be straightened out so that all of said holder connecting rivets can ride upon the guides at said station.

16. The combination as specified in claim 14, wherein the continuous chain includes slide holders alternately connected by a pair of said relatively long rivets spaced apart, and ka pair of ,said relatively short rivets spaced apart, and the guides between stations include protruding abutments over wh'ch said relatively ylong' rivets are adapted to successively ride, for the purpose described.

17. In a machine of the Vcharacter described, a continuous chain of'slide holders, duplicate stations past which said holders are adapted to be successively fed and at which each holder is adapted to remain for a jin'edetermined interval of time, mechanism for successively feeding a holder at each station, said mechanism including a master cam and devices for rotating said cam, and a rockshaft at each station, the rockshaft having 'an arm adapted to be actuated once by ,said cam during each of its revolutions to rotate said rockshaft, and a slide holder engaging member associated with said rockshaft to be thrown therebv,l

and means for returning the rockshaft and member to normal position when the cam has released the arm.

18. The combination as specified in claim 17, wherein there is an adjustment between said roclrshaft and .slide holder engaging member for regulating the throw of said engaging member.

-19. InY a machine of the character described, a` slide holder feeder comprising members adapted to reciprocate, oppositely disposed pins carried by said members, guides in which said pins are adapted to ride, and pawls carried by said pins and adapted to engage a slidey holder when the` feeder moves in feeding direction and to slide over said holder `when the feeder moves rearwardly.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut, this 27 day of June, A. D. 1924.

' EMERICK lV. BERGERE. 

